192 lines
7.9 KiB
C
192 lines
7.9 KiB
C
/*****************************************************************************
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Copyright (c) 2014, Intel Corp.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************
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* Contents: Native middle-level C interface to LAPACK function dgesvdq
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* Author: Intel Corporation
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*****************************************************************************/
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#include "lapacke_utils.h"
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lapack_int API_SUFFIX(LAPACKE_dgesvdq_work)( int matrix_layout, char joba, char jobp,
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char jobr, char jobu, char jobv,
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lapack_int m, lapack_int n, double* a,
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lapack_int lda, double* s, double* u, lapack_int ldu,
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double* v, lapack_int ldv, lapack_int* numrank,
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lapack_int* iwork, lapack_int liwork,
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double* work, lapack_int lwork,
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double* rwork, lapack_int lrwork )
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{
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lapack_int info = 0;
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if( matrix_layout == LAPACK_COL_MAJOR ) {
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/* Call LAPACK function and adjust info */
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LAPACK_dgesvdq( &joba, &jobp, &jobr, &jobu, &jobv, &m, &n, a, &lda, s, u, &ldu, v, &ldv,
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numrank, iwork, &liwork, work, &lwork, rwork, &lrwork, &info );
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if( info < 0 ) {
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info = info - 1;
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}
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} else if( matrix_layout == LAPACK_ROW_MAJOR ) {
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lapack_int nrows_u;
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lapack_int ncols_u;
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lapack_int nrows_v;
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lapack_int ncols_v;
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if( API_SUFFIX(LAPACKE_lsame)( jobu, 'a' ) ) {
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nrows_u = m;
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ncols_u = m;
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}
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else if( API_SUFFIX(LAPACKE_lsame)( jobu, 's' ) ||
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API_SUFFIX(LAPACKE_lsame)( jobu, 'u' ) ||
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API_SUFFIX(LAPACKE_lsame)( jobu, 'r' ) ) {
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nrows_u = m;
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ncols_u = n;
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}
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else if( API_SUFFIX(LAPACKE_lsame)( jobu, 'f' ) ) {
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nrows_u = n;
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ncols_u = n;
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} else {
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nrows_u = 1;
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ncols_u = 1;
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}
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/* in the case joba == 'e', v_t is used as a workspace */
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if( API_SUFFIX(LAPACKE_lsame)( jobv, 'a' ) ||
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API_SUFFIX(LAPACKE_lsame)( jobv, 'v' ) ||
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API_SUFFIX(LAPACKE_lsame)( jobv, 'r' ) ||
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API_SUFFIX(LAPACKE_lsame)( joba, 'e' ) ) {
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nrows_v = n;
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ncols_v = n;
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} else {
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nrows_v = 1;
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ncols_v = 1;
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}
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lapack_int lda_t = MAX(1,m);
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lapack_int ldu_t = MAX(1,nrows_u);
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lapack_int ldv_t = MAX(1,nrows_v);
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double* a_t = NULL;
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double* u_t = NULL;
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double* v_t = NULL;
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/* Check leading dimension(s) */
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if( lda < n ) {
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info = -9;
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API_SUFFIX(LAPACKE_xerbla)( "LAPACKE_dgesvdq_work", info );
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return info;
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}
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if( ldu < ncols_u ) {
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info = -12;
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API_SUFFIX(LAPACKE_xerbla)( "LAPACKE_dgesvdq_work", info );
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return info;
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}
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if( ldv < ncols_v ) {
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info = -14;
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API_SUFFIX(LAPACKE_xerbla)( "LAPACKE_dgesvdq_work", info );
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return info;
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}
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/* Query optimal working array(s) size if requested */
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if ( ( liwork == -1 ) || ( lwork == -1 ) || ( lrwork == -1 ) ) {
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LAPACK_dgesvdq( &joba, &jobp, &jobr, &jobu, &jobv, &m, &n, a, &lda_t,
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s, u, &ldu_t, v, &ldv_t, numrank, iwork, &liwork,
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work, &lwork, rwork, &lrwork, &info );
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return (info < 0) ? (info - 1) : info;
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}
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/* Allocate memory for temporary array(s) */
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if ( ( m > 0 ) && ( n > 0 ) ){
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a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
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if( a_t == NULL ) {
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info = LAPACK_TRANSPOSE_MEMORY_ERROR;
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goto exit_level_0;
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}
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u_t = (double*)LAPACKE_malloc( sizeof(double) * ldu_t * MAX(1,ncols_u) );
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if( u_t == NULL ) {
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info = LAPACK_TRANSPOSE_MEMORY_ERROR;
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goto exit_level_1;
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}
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v_t = (double*)LAPACKE_malloc( sizeof(double) * ldv_t * MAX(1,ncols_v) );
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if( v_t == NULL ) {
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info = LAPACK_TRANSPOSE_MEMORY_ERROR;
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goto exit_level_2;
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}
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}
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/* Transpose input matrices */
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if ( ( m > 0 ) && ( n > 0 ) ){
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API_SUFFIX(LAPACKE_dge_trans)( matrix_layout, m, n, a, lda, a_t, lda_t );
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}
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/* Call LAPACK function and adjust info */
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LAPACK_dgesvdq( &joba, &jobp, &jobr, &jobu, &jobv, &m, &n, a, &lda_t,
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s, u, &ldu_t, v, &ldv_t, numrank, iwork, &liwork,
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work, &lwork, rwork, &lrwork, &info );
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if( info < 0 ) {
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info = info - 1;
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}
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/* Transpose output matrices */
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if ( ( m > 0 ) && ( n > 0 ) ){
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API_SUFFIX(LAPACKE_dge_trans)( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
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if( API_SUFFIX(LAPACKE_lsame)( jobu, 'a' ) ||
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API_SUFFIX(LAPACKE_lsame)( jobu, 's' ) ||
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API_SUFFIX(LAPACKE_lsame)( jobu, 'u' ) ||
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API_SUFFIX(LAPACKE_lsame)( jobu, 'r' ) ||
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API_SUFFIX(LAPACKE_lsame)( jobu, 'f' ) ) {
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API_SUFFIX(LAPACKE_dge_trans)( LAPACK_COL_MAJOR, nrows_u, ncols_u, u_t, ldu_t,
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u, ldu );
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}
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/* we do not transpose v_t back to v in the case (joba == 'e') because, in this case, v_t is used as a workspace */
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if( API_SUFFIX(LAPACKE_lsame)( jobv, 'a' ) ||
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API_SUFFIX(LAPACKE_lsame)( jobv, 'v' ) ||
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API_SUFFIX(LAPACKE_lsame)( jobv, 'r' )) {
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API_SUFFIX(LAPACKE_dge_trans)( LAPACK_COL_MAJOR, nrows_v, ncols_v, v_t, ldv_t, v,
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ldv );
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}
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}
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/* Release memory and exit */
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if ( ( m > 0 ) && ( n > 0 ) ) { LAPACKE_free( v_t ); v_t = NULL; }
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exit_level_2:
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if ( ( m > 0 ) && ( n > 0 ) ) { LAPACKE_free( u_t ); u_t = NULL; }
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exit_level_1:
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if ( ( m > 0 ) && ( n > 0 ) ) { LAPACKE_free( a_t ); a_t = NULL; }
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exit_level_0:
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if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
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API_SUFFIX(LAPACKE_xerbla)( "LAPACKE_dgesvdq_work", info );
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}
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} else {
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info = -1;
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API_SUFFIX(LAPACKE_xerbla)( "LAPACKE_dgesvdq_work", info );
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}
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return info;
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}
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